Sewage treatment agent spreading device for rural sewage treatment

Abstract

The invention provides a sewage treatment agent sowing device for rural sewage treatment, comprising: a crushing device for crushing a solid sewage treatment agent; the main material collecting pipeline is connected to the crushing device and is used for receiving the crushed powder; the spraying mechanism is arranged on the periphery of the main material collecting pipeline and comprises a plurality of evenly-distributed material distributing pipelines, and the material distributing pipelines enable powder entering from the main material collecting pipeline to be conveyed into the material distributing pipelines under the action of centrifugal force; the sowing disc is positioned below the spraying mechanism, is provided with a discharging hole and is used for uniformly sowing the sewage treatment agent from the material distribution pipeline into the sewage treatment tank; the separation blades are installed at the tail positions of the material distribution pipelines, the material distribution pipelines are designed to be of a spiral structure, and a plurality of ventilation holes are formed in the outer walls of the material distribution pipelines. According to the scheme of the embodiment of the invention, the problem of how to enable the sewage treatment agent to be in more uniform contact with pollutants in sewage can be solved, and the reaction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, and in particular to a sewage treatment agent spreading device for rural sewage treatment. Background Art

[0002] The sewage treatment agent spreading device for rural sewage treatment is a sewage treatment equipment designed for rural areas to improve sewage treatment efficiency and reduce environmental pollution. The device achieves the purpose of purifying water quality by evenly spreading sewage treatment agents in sewage. However, in practical applications, how to make the sewage treatment agent contact with the pollutants in the sewage more evenly becomes a key technical issue. Due to factors such as uneven distribution of pollutants in sewage and unstable flow rate, the sewage treatment agent may not contact the pollutants sufficiently, thus affecting the reaction efficiency and treatment effect. Summary of the invention

[0003] In view of this, the present invention provides a sewage treatment agent spreading device for rural sewage treatment, which at least partially solves the problems existing in the prior art.

[0004] The present invention discloses a sewage treatment agent spreading device for rural sewage treatment, comprising:

[0005] A crushing device, used for crushing solid sewage treatment agents;

[0006] A main collecting pipe connected to the pulverizing device for receiving the pulverized powder;

[0007] The spraying mechanism is arranged around the main material collecting pipe and comprises a plurality of evenly distributed material distributing pipes. The powder entering from the main material collecting pipe is transferred to each material distributing pipe by the action of centrifugal force.

[0008] The spreading plate is located below the spraying mechanism and is provided with a discharge hole for evenly spreading the sewage treatment agent from the distribution pipe into the sewage treatment tank;

[0009] The baffle is installed at the end of each material distribution pipeline, and the material distribution pipeline adopts a spiral structure design and is provided with a plurality of ventilation holes on its outer wall.

[0010] Preferably, the pulverizing device comprises two rotating grinding discs with adjustable gaps, and the surfaces of the grinding discs are provided with a plurality of protrusions, so that the distance between the grinding discs can be adjusted according to different particle size requirements.

[0011] Preferably, a screen is additionally provided at the inlet of the pulverizing device.

[0012] Preferably, a mixing device including a plurality of stirring blades is installed on the main collecting pipe.

[0013] Preferably, an air pressure detection device is provided at the end of the main collecting pipe.

[0014] Preferably, a micro fan is provided at the end of the material distribution pipeline.

[0015] Preferably, the spraying mechanism is internally provided with multi-stage material distribution blades.

[0016] Preferably, the size of the discharge hole of the spreading plate is adjustable.

[0017] Preferably, a plurality of nozzles are provided at the bottom of the spreading plate.

[0018] The present invention provides a sewage treatment agent spreading device for rural sewage treatment, comprising: a crushing device for crushing solid sewage treatment agents; a main aggregate pipe connected to the crushing device for receiving crushed powders; a spraying mechanism arranged around the main aggregate pipe, comprising a plurality of evenly distributed distribution pipes, wherein the distribution pipes transmit the powders entering from the main aggregate pipe to each distribution pipe through the action of centrifugal force; a spreading plate located below the spraying mechanism, provided with a discharge hole, for evenly spreading the sewage treatment agent from the distribution pipe into the sewage treatment pool; a baffle installed at the end of each distribution pipe, and the distribution pipe adopts a spiral structure design, and is provided with a plurality of ventilation holes on its outer wall. Through the scheme of the present invention, it is possible to solve how to make the sewage treatment agent contact with the pollutants in the sewage more evenly, thereby improving the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0020] Figure 1 It is a schematic diagram of the axial structure of the spreading device of the present invention;

[0021] Figure 2 For the present invention Figure 1 The structural schematic diagram of the rotating grinding disc;

[0022] Figure 3 For the present invention Figure 1 A magnified front view of the cross section of the multi-stage material distribution fan blade;

[0023] In the figure: 1. crushing device; 11. rotating grinding disc; 12. screen; 2. main collecting pipe; 21. material distribution pipe; 22. mixing device; 23. stirring blade; 24. ventilation hole; 25. air pressure detection device; 3. spraying mechanism; 31. multi-stage material distribution fan blade; 4. spreading disc; 41. discharge hole; 42. nozzle; 5. sewage treatment tank; 6. baffle DETAILED DESCRIPTION

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0025] like Figure 1 As shown, a sewage treatment agent spreading device for rural sewage treatment applied by the present invention comprises a crushing device 1, a main aggregate pipe 2, a spraying mechanism 3, a spreading plate 4 and a baffle 6. Among them, the crushing device 1 is used to efficiently crush the sewage treatment agent in a solid state to ensure that the particle size of the powder meets the requirements so that it can more fully contact with the pollutants in the sewage, thereby improving the chemical reaction efficiency. The main aggregate pipe 2 is connected to the outlet end of the crushing device 1, which is used to receive the powder after the crushing treatment and transport it to the subsequent spraying link. The spraying mechanism 3 is located around the main aggregate pipe 2 and is composed of a plurality of evenly distributed distribution pipes 21. These distribution pipes 21 are used to evenly distribute the powder entering from the main aggregate pipe 2 and further transmit it to each distribution pipe 21 through the action of centrifugal force. The spreading plate 4 is located below the spraying mechanism 3, and is provided with a discharge hole 41 inside, which is used to evenly spread the powder transmitted from the distribution pipe 21 into the sewage treatment tank 5. The baffle 6 is installed at the end of each material distribution pipe 21 to accurately control the spreading process of the sewage treatment agent so that it can be spread in an appropriate amount at the required time and place to prevent excessive input or repeated spreading.

[0026] Specifically, the crushing device 1 uses a high-efficiency grinding disc or a ball mill to mechanically crush the solid treatment agent to significantly reduce its particle size. The main collecting pipe 2 is generally made of metal or corrosion-resistant plastic material, and the pipe is designed to have a sufficiently large diameter to reduce the risk of powder blockage during transportation. The number and layout of the distribution pipes 21 of the spraying mechanism 3 are optimized to ensure that each pipe can obtain a uniform powder flow rate, and the centrifugal force generated by rotation further ensures the uniform distribution of the powder. The spreading plate 4 is made of corrosion-resistant material, and is provided with a number of evenly distributed discharge holes 41 inside. The sizes of these apertures are calculated to ensure that the powder is evenly dispersed into the sewage treatment tank 5. The baffle 6 is manually or automatically controlled, and is opened and closed by a mechanical arm or a pneumatic device to ensure that the spreading can be stopped quickly when needed to avoid repeated spreading or excessive input, thereby saving the dosage of the agent and maintaining the environmental balance in the treatment tank.

[0027] In one embodiment, the sewage treatment agent spreading device of the present invention successfully solves the technical problem of how to make the sewage treatment agent contact the pollutants in the sewage more evenly through a series of carefully designed and optimized components working together. First, through the efficient crushing of the crushing device 1, the particle size of the powder is ensured to be suitable and easy to be evenly dispersed in the sewage; secondly, the design of the main collecting pipe 2 avoids the blockage problem during the transportation process, and ensures that the powder enters the spraying mechanism 3 continuously and smoothly; thirdly, the spraying mechanism 3 uses centrifugal force to achieve uniform distribution of the powder in each distribution pipe 21; finally, the spreading plate 4 optimizes the layout of the discharge hole 41 to ensure that the powder is evenly covered on the surface of the sewage treatment tank 5. In addition, the introduction of the baffle 6 provides a flexible control system that can accurately control the amount of the agent to be spread, avoid excessive or repeated input, further improve the treatment efficiency and resource utilization, and maintain the environmental balance in the treatment tank.

[0028] like Figure 2 As shown, a pulverizing device 1 of a sewage treatment agent spreading device for rural sewage treatment applied by the present invention includes two rotating grinding discs 11 with adjustable gaps, and a plurality of protrusions are arranged on the surfaces of the grinding discs. By adjusting the spacing between the grinding discs, the device can accurately pulverize the solid sewage treatment agent under different particle size requirements to ensure its uniformity and efficient contact with pollutants in the sewage. Specifically, the two grinding discs are relatively installed in the pulverizing chamber of the device, one of which is fixed, and the other can be moved up and down or horizontally by an adjusting mechanism to change the gap between the two. There are a plurality of protrusions distributed on the surface of the grinding disc, and the design of these protrusions increases the contact area between the material and the grinding disc, thereby improving the pulverizing efficiency.

[0029] Specifically, the protrusions of the grinding disc can be designed into different shapes and arrangements as needed, such as pointed, semicircular or prismatic, to adapt to sewage treatment agents of different properties. In actual operation, the position of the movable grinding disc can be adjusted manually or electrically to change the spacing between the grinding discs to achieve the required crushing particle size. This adjustable design enables the device to adapt to a variety of particle size requirements, improving its flexibility and scope of application. For example, when processing larger particles of solid sewage treatment agents, the spacing between the grinding discs can be increased; when finer particles are required, the spacing can be reduced.

[0030] Return to reference Figure 1 The sewage treatment agent spreading device for rural sewage treatment applied by the present invention has a screen 12 added at the entrance of the pulverizing device 1. The purpose of this design is to filter out larger particles of debris in advance to prevent these impurities from entering the pulverizing device 1, thereby avoiding a negative impact on the working efficiency of the equipment. The design of the screen 12 can effectively prevent large particles that are not suitable for pulverization from passing through, ensuring that the raw material particles entering the pulverizing device 1 meet the processing requirements, thereby improving the purity and uniformity of the powder.

[0031] In addition, the addition of the screen 12 can also remove some hard debris that cannot be crushed in the pre-processing stage, reducing the interference of these debris with the subsequent processing steps. By installing this screen 12 at the front end of the crushing device 1, not only the overall operating stability and reliability of the equipment can be improved, but also the service life of the equipment can be extended. The screen 12 is usually made of stainless steel material, has high strength and corrosion resistance, and can maintain a good filtering effect in long-term use.

[0032] For example, the specific installation method of the screen 12 is to fix it at the entrance of the crushing device 1, and it can be firmly fixed at the corresponding position by connecting parts such as screws or buckles. The mesh size of the screen 12 can be adjusted according to actual needs to better adapt to different types of raw materials and process requirements. Specifically, the screen 12 can be fixed at the entrance through a detachable frame, which is convenient for replacement or cleaning when necessary. In this way, the safety and effectiveness of the operation of the device are guaranteed, and maintenance is also convenient.

[0033] In one embodiment, a mixing device 22 is installed on the main aggregate pipe 2 of a sewage treatment agent spreading device for rural sewage treatment applied by the present invention. The device includes a plurality of stirring blades 23, which can fully mix the powder coming out of the crushing device 1 with the airflow in the main aggregate pipe 2. This design effectively enhances the fluidity of the powder and ensures its uniformity in the subsequent transportation process. The mixing device 22 is located inside the main aggregate pipe 2 and is firmly mounted on the inner wall of the pipe through a fixing frame. The stirring blades 23 are evenly distributed inside the pipe to form an efficient stirring area, so that the powder and the airflow can be fully mixed before entering the subsequent transportation stage.

[0034] For example, a fixed frame can be first set at a predetermined position of the main aggregate pipe 2, and the fixed frame is used to support the mixing device 22 and ensure its stability and firmness. Subsequently, a number of stirring blades 23 are evenly distributed and fixed on the fixed frame to form a continuous stirring area. The shape and angle of these stirring blades 23 are specially designed to generate sufficient shear force under the action of airflow, so as to effectively mix the powder output from the pulverizing device 1 with the airflow in the main aggregate pipe 2. In this way, not only the mixing efficiency is improved, but also it is ensured that the powder will not be agglomerated or uneven during the subsequent transportation process.

[0035] In one embodiment, an air pressure detection device 25 is provided at the end of the main collecting pipe 2 of a sewage treatment agent spreading device for rural sewage treatment applied by the present invention. The device can monitor the air pressure inside the pipe in real time, and adjust the airflow intensity through the control system, so as to ensure the uniformity and agglomeration-free of the powder during the transmission process, and further improve the contact effect between the powder and the sewage. Specifically, the air pressure detection device 25 includes a sensor and a control unit, the sensor is installed at the end of the main collecting pipe 2, and the control unit is connected to the sensor and integrated into the control system of the entire device. This design can not only obtain air pressure data in real time, but also automatically adjust the airflow according to data feedback to ensure that the transmission state of the powder is always kept optimal.

[0036] For example, the sensor is installed at the end of the main aggregate pipe 2, directly in contact with the airflow in the pipe, and can collect the air pressure data in the pipe in real time. The control unit is connected to the sensor through wires to transmit the collected data to the control system. The control system has a preset air pressure range. Once the detected air pressure exceeds or falls below the set value, the control system will automatically adjust the airflow intensity to keep the air pressure in the pipe within a reasonable range. This series of operations can be achieved by adjusting the speed of the fan or the opening of the air valve.

[0037] In one embodiment, a micro fan is provided at the end of a material distribution pipe 21 of a sewage treatment agent spreading device for rural sewage treatment in the present invention. The main function of the micro fan is to accurately control the speed and amount of the powder entering each spreading plate 4 by adjusting the working intensity, thereby ensuring that the powder is more evenly diffused in the water. The installation position of the micro fan is located at the end of the material distribution pipe 21, close to the feed port of each spreading plate 4. By adjusting the working intensity of the micro fan, the conveying speed and amount of the powder can be effectively controlled, so that the powder can be more evenly distributed to each spreading plate 4, thereby achieving effective treatment of sewage.

[0038] Specifically, the micro fan is connected to the material distribution pipe 21 through a fixed bracket or a snap-on device to ensure that the micro fan remains stable during operation. In addition, the micro fan is connected to the control system, and the rotation speed of the fan can be adjusted by the signal of the control system, so as to achieve precise control of the amount of powder. For example, when the amount of sewage is large or the water quality is complex, the speed of the micro fan can be increased to increase the speed and amount of the powder delivery, while when the amount of sewage is small or the water quality is clean, the speed of the micro fan can be reduced to reduce the amount of powder. In this way, the working intensity adjustment of the micro fan can flexibly adjust the speed and amount of the powder entry according to the requirements of different working conditions, ensuring the uniform distribution of the powder in each sowing disk 4.

[0039] In one embodiment, Figure 3 As shown, a spraying mechanism 3 in a sewage treatment agent spreading device for rural sewage treatment in the present invention is provided with multi-stage material distribution blades 31 inside. These blades are arranged at a specific angle, and through the dual effects of centrifugal force and air flow, the powder fed from the main collecting pipe 2 is dispersed into multiple sub-pipes, thereby ensuring uniform distribution of the powder. The design of the multi-stage material distribution blades 31 enables the powder to be efficiently pre-dispersed before entering the sub-pipes, further improving the overall spraying uniformity.

[0040] In the specific design, each sub-pipeline adopts a spiral structure design and is provided with a plurality of ventilation holes 24 on the outer wall. The spiral structure in the pipeline works together with the external ventilation holes 24 through rotational motion to ensure that the powder can be fully stirred and diffused during the transportation process. This design not only helps to evenly distribute the powder in the pipeline, but also increases the contact area between the powder and the sewage, thereby improving the treatment effect. For example, by providing ventilation holes 24 on the outer wall of the sub-pipeline, outside air can be introduced to further improve the fluidity of the powder, thereby ensuring its even distribution during the spraying process.

[0041] Return to reference Figure 1In one embodiment, the discharge hole 41 of the spreading plate 4 of a sewage treatment agent spreading device for rural sewage treatment applied by the present invention is an adjustable aperture structure. This design is intended to adjust the size of the discharge hole 41 according to different types of sewage treatment agents and their physical properties (such as particle size, fluidity, etc.), so as to achieve effective control of the spreading speed and density. By adjusting the size of the discharge hole 41, it can be ensured that the sewage treatment agent is more evenly distributed in the sewage during the spreading process, thereby improving the contact efficiency between the treatment agent and the sewage. Specifically, the adjustable aperture structure can be implemented in a variety of ways, for example, using a sliding baffle, a rotatable plate change or a threaded adjustment mechanism to change the actual opening of the discharge hole 41.

[0042] In one embodiment, the adjustable aperture structure can be realized by a sliding baffle. The sliding baffle is installed inside or on the edge of the spreading disc 4, and can move relative to the fixed part to adjust the opening area of ​​the discharge hole 41. When the diameter of the discharge hole 41 needs to be increased, push the sliding baffle to the specified position; when the diameter of the discharge hole 41 needs to be reduced, move the sliding baffle in the opposite direction. In addition, it can also be realized by a rotatable plate replacement method, that is, multiple rotatable adjustment plates are installed on the spreading disc 4, and the actual aperture of the discharge hole 41 is adjusted by rotating the adjustment plates. Another possible implementation method is to use a threaded adjustment mechanism, that is, a threaded hole is set inside the spreading disc 4, and an adjustment rod that can be screwed into the threaded hole is configured, and the size of the discharge hole 41 is changed by rotating the adjustment rod. These technical solutions can be flexibly applied to different usage scenarios and needs.

[0043] In one embodiment, in a sewage treatment agent spreading device for rural sewage treatment applied by the present invention, a plurality of nozzles 42 are provided at the bottom of the spreading plate 4. The angles and apertures of these nozzles 42 can be adjusted according to specific treatment requirements to meet the sewage treatment needs under different conditions. Through this design, the best spreading effect can be achieved under various operating conditions, further improving the contact area and uniformity between the sewage treatment agent and the sewage pollutants. The design of the nozzle 42 not only enhances the flexibility and applicability of the device, but also improves the treatment efficiency, ensuring that the sewage treatment agent can be evenly distributed in the sewage and effectively remove pollutants.

[0044] In a specific embodiment, the nozzles 42 are installed at the bottom of the spreading plate 4 and are distributed in an array. Each nozzle 42 is made of corrosion-resistant material to ensure stability in long-term use. The angle of the nozzle 42 can be adjusted by an adjustable bracket installed under the spreading plate 4, and the aperture of the nozzle 42 can be achieved by replacing nozzles 42 of different specifications. For example, the user can select a suitable angle and aperture combination according to the specific pollution degree and water quality of the sewage to be treated, so as to achieve the best spreading effect.

[0045] In one embodiment, a sewage treatment agent spreading device for rural sewage treatment applied by the present invention includes a special baffle 6 design, which is made of flexible material and can be adjusted manually or electrically. This design is intended to prevent excessive delivery in the same area and ensure that the sewage treatment agent is more evenly distributed throughout the treatment tank. The adjustment range of the baffle 6 can be flexibly changed according to actual needs to adapt to different sewage treatment scenarios. This flexible baffle 6 can not only protect other components inside the device from impact and wear to a certain extent, but also reduce noise and friction during the adjustment process. In addition, the installation position of the baffle 6 is located at the outlet of the device, which can play a role in regulating the flow rate when the material passes through.

[0046] For example, specifically, the flexible baffle 6 is installed at the bottom discharge port of the device, and is fixedly connected to the frame around the discharge port to form an adjustable discharge channel. When manual adjustment is required, the angle and position of the baffle 6 can be changed by rotating the handle or pulling the adjustment rod; while electric adjustment can be achieved by installing a motor to drive the baffle 6 so that the baffle 6 can be freely adjusted between different angles. Whether manual or electric, the amount of sewage treatment agent added can be accurately controlled within a certain range according to the needs of the actual treatment pool. This design effectively avoids excessive feeding while ensuring uniform distribution of the sewage treatment agent throughout the treatment pool.

[0047] In actual operation, when this device is used, the crushing device 1 is first started, and the solid sewage treatment agent prepared in advance is put into it. After high-speed rotation and shearing, the solid treatment agent is effectively crushed into fine particles. This process not only increases the specific surface area of ​​the treatment agent, but also enhances its contact efficiency with pollutants in sewage, thereby ensuring that the subsequent treatment effect is more uniform and significant. Subsequently, the fully crushed powder is transported to the spraying mechanism 3 through the main aggregate pipe 2. The spraying mechanism 3 is located around the main aggregate pipe 2 and includes multiple evenly distributed distribution pipes 21. With the help of centrifugal force, these powders are evenly distributed to each distribution pipe 21. The design of the distribution pipe 21 enables the treatment agent to be smoothly transported downward under the combined action of centrifugal force and its own gravity until it reaches the spreading plate 4. The spreading plate 4 is provided with a discharge hole 41, which can evenly sprinkle the treatment agent into the sewage treatment tank 5, so that the powder can be quickly diffused in the water body, further improving the treatment effect. At the same time, a baffle 6 is installed at the end of each material distribution pipe 21, and the spreading process of the treatment agent can be accurately controlled by adjusting the position of the baffle 6. In the actual spreading process, according to the needs of sewage treatment and the treatment situation in the current area, the state of the baffle 6 can be controlled to stop the spreading in time, avoid repeated spreading and excessive delivery, effectively save the amount of treatment agent used, and maintain the environmental balance in the treatment pool. This intelligent and refined operation not only improves the efficiency and quality of sewage treatment, but also significantly reduces operating costs.

[0048] The exemplary systems and methods of the present invention have been specifically shown and described with reference to the above embodiments, which are merely examples of the best modes for implementing the present systems and methods. It will be appreciated by those skilled in the art that various changes may be made to the embodiments of the systems and methods described herein when implementing the present systems and / or methods without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A sewage treatment agent spreading device for rural sewage treatment, characterized in that: include: A pulverizing device (1) is used to pulverize the solid sewage treatment agent; A main collecting pipe (2), connected to the pulverizing device (1), for receiving the pulverized powder; The spraying mechanism (3) is arranged around the main material collecting pipe (2), and comprises a plurality of evenly distributed material distribution pipes (21). The material distribution pipes (21) transmit the powder entering from the main material collecting pipe (2) to each material distribution pipe (21) through the action of centrifugal force; A spreading plate (4), located below the spraying mechanism (3), is provided with a discharge hole (41) for evenly spreading the sewage treatment agent from the distribution pipe (21) into the sewage treatment tank (5); The baffle (6) is installed at the end of each material distribution pipe (21), and the material distribution pipe (21) adopts a spiral structure design and is provided with a plurality of ventilation holes (24) on its outer wall.

2. A sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: The pulverizing device (1) comprises two rotating grinding discs (11) with adjustable gaps, and the surfaces of the grinding discs (11) are provided with a plurality of protrusions, so that the distance between the grinding discs can be adjusted according to different particle size requirements.

3. The sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: A screen (12) is additionally provided at the inlet of the pulverizing device (1).

4. The sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: The main collecting pipe (2) is provided with a mixing device (22) comprising a plurality of stirring blades (23).

5. The sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: An air pressure detection device (25) is provided at the end of the main material collecting pipe (2).

6. A sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: A micro fan is provided at the end of the material distribution pipeline (21).

7. The sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: The spraying mechanism (3) is internally provided with multi-stage material distribution blades (31).

8. The sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: The size of the discharge hole (41) of the spreading plate (4) can be adjusted.

9. The sewage treatment agent spreading device for rural sewage treatment according to claim 1, characterized in that: A plurality of nozzles (42) are provided at the bottom of the spreading disc (4).

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